Glass boot



FIG. 1 is a left side elevation view of the glass boot with the right side being a mirror image of the left side;

FIG. 2 is a front elevation view of the glass boot;

FIG. 3 is a rear elevation view of the glass boot; and,

FIG. 4 is a top view of the glass boot.

the shading lines and dash lines in the drawings form no part of the claimed design. 

The ornamental design for a glass boot, as shown and described. 